An exhaustive family portrait would involve six generations of M3, the little E30 as dwarfed among them as an errant toddler in a football crowd. These are the last three six-cylinder M3s perhaps the last if the G80s eventual replacement goes hybrid or EV. The new BMW i4, with the higher peak power as the latest M3, certainly hints at the latter.Gather them together and whats clear is that controversy hasnt infiltrated the M3 atmosphere via big grilles and a drift app; its been inherent in the car for decades. The E46 on the left of shot, so delectable to look at, brought the optional (and clunky) SMG paddleshift gearbox into the range. Its easy to argue that alongside Ferraris F1 transmission that it helped hammer the first nails in the manuals coffin.Taking us to the F80 on the right of shot: in its final year on sale, a paltry 0.5 per cent of UK customers went for a stick in the middle. We no longer get the option, funnily enough. Its own controversy was the introduction of turbocharging to the M3, with a side order of handling edge in its early days that was gradually ironed out with a facelift and Competition pack.And heres another stat that may surprise you: BMW sold almost twice as many F80-gen M3s as it did E90s. Thats because around two thirds of them were actually M4s. Where those of us who geek out on performance cars felt a bit affronted by the two-door M3 being renamed, those who buy or lease these things hit upon a new reason to defect from rivals.So the split remains for the G80, and again BMW insists the two cars have been developed to handle identically. The M3s four-door body is a little wider and taller than the M4 two-door but their key numbers wheelbase and track widths are exactly the same while their weight is separated by just 5kg (in the M4s favour). Any chassis tweaks between them have purely been to bring equilibrium.The consensus after a day at Castle Combe is that the M3 handles the tiniest bit sweeter, however, sliding with a touch more approachability. Though tyre life could have played its part; on road theyre impossible to split. Whats unarguable is how much burlier the M3 looks, its arches more obviously swollen and its intent somehow more brooding. Our pick? Stay in the minority (while saving £1,300) and go M3. Especially now theres a Touring coming.Photography: Jonny Fleetwood